3Com Switch 8800 Family Configuration Guide

192 CHAPTER 22: QOS CONFIGURATION
n
It is required that CIR is less than or equal to PIR and CBS is less than or equal to
EBS. You are recommended to configure CBS and EBS to numbers that are 100 to
150 times of CIR.
For service processor cards, perform the following configurations in VLAN view.
c
CAUTION:
■ Before executing the traffic-limit command on a service processor card, you
must first configure traffic redirection in Ethernet port view to redirect the
packets of a specific VLAN to the service processor card.
■ Before configuring traffic policing, you must first define corresponding ACLs
and configure the DSCP+ Conform-Level -> Service parameters mapping table
and the Local-precedence + Conform-Level -> 802.1p priority mapping table.
You must first define the corresponding ACL and configure the DSCP +
Conform-Level -> Service parameters mapping table and Local-precedence +
Conform-Level -> mapping table before starting this configuration.
This configuration achieves traffic policing for the packets that match the ACL. If
the traffic rate threshold is exceeded, corresponding measures will be taken, for
example, dropping excessive packets.
system-index index here is the system index for an ACL rule. When delivering a
rule, the system assigns a globally unique index to it, for convenience of later
Configure traffic policing
which applies IP group ACL
and link group ACL at same
time
traffic-limit inbound ip-group { acl-number | acl-name } {
rule rule link-group { acl-number | acl-name } [ rule rule [
system-index index ] ] | link-group { acl-number | acl-name }
rule rule } [ tc-index index ] cir cbs ebs [ pir ] [ conform { {
remark-cos | remark-drop-priority }* |
remark-policed-service } ] [ exceed { forward | drop } ]
Remove traffic policing
setting which applies IP
group ACL and link group
ACL at same time
undo traffic-limit inbound ip-group { acl-number | acl-name
} { rule rule link-group { acl-number | acl-name } [ rule rule ] |
link-group { acl-number | acl-name } rule rule }
Configure traffic policing
which only applies link group
ACL
traffic-limit inbound link-group { acl-number | acl-name } [
rule rule [ system-index index ] ] [ tc-index index ] cir cbs ebs
[ pir ] [ conform { { remark-cos | remark-drop-priority }* |
remark-policed-service } ] [ exceed { forward | drop } ]
Remove traffic policing
setting which only applies
link group ACL
undo traffic-limit inbound link-group { acl-number |
acl-name } [ rule rule ]
Table 164 Configure traffic policing
Operation Command
Tabl e 165 Configure traffic policing
Operation Command
Configure traffic policing which
only applies IP group ACL
traffic-limit inbound ip-group { acl-number | acl-name
} [ rule rule [ system-index index ] ] traffic-index index
] [ conform { { remark-cos | remark-policed-service } ]
[ exceed { forward | drop } ] slot slotid
Remove traffic policing setting
which only applies IP group ACL
undo traffic-limit inbound ip-group { acl-number |
acl-name } [ rule rule ] slot slotid